compiler error in anaconda qutip

[Casey Fitzpatrick]

Hi, I hope I'm handling this correctly, as I'm new to qutip ...

I've been trying to set up qutip within my anaconda distribution using 

    conda install -c https://conda.anaconda.org/jrjohansson qutip

The package linking completes with no errors. But when I 

    import qutip

I get the following

    ImportError: Building module qutip.cy.spmatfuncs failed:
    ["CompileError: command 'gcc' failed with exit status 1\n"]

After running

    

    conda update gcc
    conda update cython

I get the same error.

I am running OS X 10.11.1. I attached terminal output in case it's useful.

I'm really looking forward to using this software for thesis work, so I hope to get resolved ASAP! Thanks for reading.

[Casey Fitzpatrick]

RESOLVED.

First, I changed to a source install inside the anaconda site-packages folder instead of pulling from the site. I was still getting the error, but I found this similar issue, which suggested I remove the fpmath calls in a couple of the c compiler setup.py files. In particular, the setups in the cy and control subdirectories (see links). For instance, something like 

            extra_compile_args=['-w', '-ffast-math',
                                '-O3', '-march=native, '-mfpmath=sse']

to

            extra_compile_args=['-w', '-ffast-math',
                                '-O3', '-march=native'], #, '-mfpmath=sse'

For some reason, this wasn't working either, so I decided to try changing

-march=native

to

 -march=x86-64

, and that did the trick!

[c.alanfi...@gmail.com]

Hi, I hope I'm handling this correctly, as I'm new to qutip... 

I've been trying to set up qutip within my anaconda distribution using 

    conda install -c https://conda.anaconda.org/jrjohansson qutip

The package linking completes with no errors. But when I 

    import qutip

I get the following

    ImportError: Building module qutip.cy.spmatfuncs failed:
    ["CompileError: command 'gcc' failed with exit status 1\n"]

After running

    

    conda update gcc
    conda update cython

I get the same error.

I am running OS X 10.11.1. My terminal output is attached, in case that would be useful.

[Alex Pitchford]

Hi, its not clear whether you have solved your install problem now.

The same issue is on the Github, and I think we are about to merge a fix.